It pretty much has to be those Y cables, any way you could test them on some other audio component like a cd player RCA out and see if the subs then work? I always thought about using a typical F connector on the end of the original wire off the sub out at the amp, hooked up to a a normal Coax cable splitter then out to each sub.


Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70